/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:
 * Date: 2024-06-23
 * Time: 18:43
 */
class MyValue{
    public int val;
}
public class Test {
    public static void swap(MyValue myValue1, MyValue myValue2){
        int tmp = myValue1.val;
        myValue1.val = myValue2.val;
        myValue2.val = tmp;
    }

    public static void main(String[] args) {
        MyValue myValue1 = new MyValue();
        MyValue myValue2 = new MyValue();

        myValue1.val = 10;
        myValue2.val = 20;
        System.out.println("输出前：" + myValue1.val + " " + myValue2.val);
        swap(myValue1, myValue2);
        System.out.println("输出前：" + myValue1.val + " " + myValue2.val);
    }
}
